Phyllanthopsis arida, the trans-Pecos maidenbush, is a rare plant species endemic to western Texas.Rare Plants of Texas, Texas A&M University, a field guide, p 80
Phyllanthopsis arida is a thornless, dioecious, deciduous, highly branching shrub up to 100 cm tall. Leaves are ovate to obovate, up to 1.0 cm long. Flower solitary or in small clusters, yellow-green, up to 3 mm in diameter. Capsule is hanging, up to 7 mm long.Webster, Grady Linder. 1967. Genera of the Euphorbiaceae in the southeastern United States. Journal of the Arnold Arboretum of Harvard University 48:303-361.Warnock, Barton Holland, & Johnston, Marshall Conring. 1960. Southwestern Naturalist 5(1): 3–6.photo of isotype of Savia arida (= Andrachne arida = Phyllanthopsis arida) at Missouri Botanical GardenVorontsova, Maria S. & Hoffmann, Petra. 2008. Kew Bulletin 63(1): 47.Correll, D. S. & M. C. Johnston. 1970. Manual of the Vascular Plants of Texas i–xv, 1–1881. The University of Texas at Dallas, Richardson.
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